1. Define Clear Metrics: Establish common KPIs to ensure everyone evaluates the data through a shared framework. 2. Encourage Open Dialogue: Foster an environment where differing perspectives are discussed constructively. 3. Leverage External Expertise: Bring in a neutral third party to offer fresh insights and resolve disagreements.

To unite your team, start by having an open discussion where everyone shares their views and listens to each other. Clarify the data's purpose so everyone is on the same page. Use visuals like charts to make the data easier to understand and focus on data-driven decisions. Find common ground by highlighting areas of agreement, and if needed, consult an expert to provide a neutral perspective. This approach will help align the team and reach a consensus on the data interpretation.

I have personally faced this in my career with my B2B software sales team. As a manager, I encourage dialogue in such situations, separate opinions from facts, make use of customer insights from my own personal experiences and pilot the various interpretations if possible. It helps if you have work experience in the subject. The manager is liable to be swayed towards his personal biases if he lacks experience in the matter.

I have experienced several times this problem, and these are 3 steps I follow: 1. Active Listening: try to undestand the root of the problem or the reason that make different people to have diverse ideas. 2. Look for similar ideas: gathering the coincidences will make the different opinions take place, this will make easy to negotiate a solution for this difficult issues. 3. Set realistic goals: once everyone undestand the problem and have an agreement, base your KPIs and use metrics that contribute to growth revenue, achievable milestones and valuable historical data based on financial and business data analytics that are well founded on scientific knowledge.